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(Russian lider; from English “leader”). (1) The head of a political party, trade union, or other social organization.
(2) The person who is in first place in some competition, such as the leader in a chess tournament or a bicycle race.
the name of a class of ships (such as a large-displacement destroyer) in use in the Soviet Navy in the 1930’s and 1940’s. A leader carried the command of the unit and sailed first in the wake column. The term “leader” is sometimes applied to a vessel that heads a group or vessels of a caravan or fleet equipped for industrial uses or prospecting.
downspout, conductor, downcomer, downpipe, leader, rain leader, rainwater pipe
leader(1) A length of unrecorded tape used to thread the tape onto the tape drive.
(2) A line of dots or dashes used to draw the eye across the printed page, such as in a table of contents.